Home / 228,155.80-342,257.17-86,120.71

Finding the Fourth Proportional to 228,155.80, 342,257.17 and 86,120.71

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Solution

The fourth proportional to 228,155.80, 342,257.17 and 86,120.71 is: 129,189.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,155.80 : 342,257.17 = 86,120.71 : x
  2. Step 2: Convert to fraction form
    228,155.80/342,257.17 = 86,120.71/x
  3. Step 3: Cross multiply
    228,155.80x = 342,257.17 × 86,120.71
  4. Step 4: Simplify right side
    228,155.80x = 29,475,430,482.99
  5. Step 5: Solve for x
    x = 29,475,430,482.99/228,155.80
  6. Step 6: Final answer
    x = 129,189.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.